Hey!
Got a question, I'm redoing a shower and have good greenboard up now from the contractor who didn't finish the job...for good reason. I know greenboard is not good for showers anymore, but in an attempt to save on teardown time, can I put vapor barrier over the greenboard and then cement board on top of that and then ceramic tile? Or is the greenboard really still compromising the integrity of the shower? Can I leave it up, vapor barrier overtop, then do cement board bottomline?

Thanks much!

Vapor barrier and green board is a bad combination. Put that on an exterior wall and thats when the real trouble starts.

Rip out the greenboard and put up cement board.